Drawing bench



June 7, 1932. J DlEHL 1,861,563

DRAWING BENCH Filed April '7, 1928 4 Sheets-Sheet 1 my h/or: i Mm $5M926/24 June 7, 1932.

J. F. DIEHL 1,861,563

DRAWING BENCH Filed April '7, 1928 4 Sheets-Sheet 2 haven/or: W e 8M J.F. DIEHL.

DRAWING BENCH June 7, 1932.

4 Sheets-Shet 3 Filed April '7, 1928 June 7,1932. J. F. DlEHL 1,861,563

DRAWING BENCH Filed April 7, 1928 4 Sheets-Sheet 4 l L. U 1 Q 30 I25 LLEJ Patented June 7, 3.932

UNITED STATES PATENT OFFICE JOHANNES FRIEDRICH DIEHL, F HERBORN,GERMANY, ASSIGNOR TO BERKENHOFF & DRECBES AKTIENGESELLSC HAFT, 0FASSLAB, NEAR WETZLAR, GERMANY DRAWING BENCH Application filed April1928, Serial No.

My invention relates to, drawing benches for use in the manufacture ofmetal wire and more particularly to multiple benches. It is an object ofmy invention to provide an improved bench of this type. To this nd I soarrange its driving mechanism that the bench is actuated from aboveinstead of from below as usual, involving the necessity of introducingthe driving'shaft through the bottom -of the tank for the coolingmedium.

Cooling by means of a liquid, such as a soap solution has been found tobe indispensable in multiplel benches as slipping of the wire on the recs is practically inevitable notwithstanding the use of stepped reelsaccordingto the variations of relative length and diameter of the wire,as the\circumferential velocity of the reels can never be predeterminedto prevent slipping throughout. For comparatively thin wires effectivecooling is particularly important. The coolingmedium may be squirted onthose parts of the Wire which are exposed to excessive friction, but asthis is often insufficient to prevent overheating, the only possibilityis to effect the drawing in a body of cooling medium. This, however,involves certain difiiculties in connection with the oldsystem ofarranging thedriving mechanism below the cooling tank. Thesediifi'culties are overcome according to my invention by arranging thewhole mechanism altogether above the cooling tank so that the reels areimmersedin the tank from above and are connected with the driving partsat their upper ends, their lower ends being free.

It is another object of my invention to provide means for varying theposition of the driving mechanism with respect to the reeling tank so asto e'fi'ect the threading of the wire outside of the cooling medium andpreferably outside of the cooling tank. Means may be provided forlifting the immersed parts from the tank, or else the tank may beadapted to be lowered with respect to the parts. A particularly suitablesolution is a rockal le arrangement of the mechanism.

In the drawings aflixed to this specification and forming part thereofbenches embody- 268,319, and in Germany April 21, 1927.

ing my invention are illustrated diagrammatically by way of example.

In the drawings Fig. 1 is a sectional elevation,

' .Fig. 2 is a plan view, and

Fig. 3 is an end elevation of a bench according to my invention in whichtwo reels are provided and the support of the driving I mechanism istrunnioned to the cooling tank,

Fig. 4 is a sectional elevation, and Fig. 5 is an end elevation of asimilar bench having a greater number of reels,

Fig. 6 is a partly sectional elevation, and

Fig. 7 is a plan viewv of a machine in which the support for the drivingmechanism is adapted to rock about a pivot which is arrangedindependently of the cooling tank.

In the old system referred to in the intro duction it is necessary thatthe operation 'should proceed from the bottom to the top of the tank andconsequently the smallest step of the reel is at the base. In thisarrangement of the parts the threading of the wire becomes extremelydiflicult and could hardly be performed if it were desired to utilizeboth directions of running of the wire for reducing its diameter.Therefore this is not done, but a single reel comprising the six stepscorresponding to the six stages of reduction is arranged on, one side ofthe drawplate instead of its steps being distributed on either side ofthe drawplate at the rate of three at the right and three at the left.

It is also most inconvenient that the upper bearing of the capstan shaftcannot hearranged above the cooling tank but this would unduly interferewith the threading of the wire. Its arrangement below the tank involvesthe necessity of providing packing means or a. sleeve for the capstanshaft. Apart from this inconvenience the diameter of the capstan shaftmust be considerable to prevent vibration at its freeend. Anothernecessity why the capstan shaft must be made rather thick is that asmentioned above, all stages must be combined in a single reel.

Therefore, and in view of the large diameter of the'shaft and of theclearance required for the sleeve, the diameter of the smallest stepbecomes inconveniently large.

Referring now to Figs. 1 to 3 the drivingis thedra-wplate which isarranged intermediate the drums 1a, 1b and is reciprocated by the usualmeans (not shown). In the normal position of the reels the shafts 6a, 6bare vertical and are immersed in the cooling tank which is preferablyfilled with the cooling mediumonly to the extent of just coverin theupper steps of the reels 1a, 1b.

11 this arrangement all difiicult-ies connected with the introduction ofthe driving shaft from below through the bottom of the liquid tank 5 areeliminated and threading is greatly facilitated as compared with the oldsystem referred to. My arrangement in volves the further advantage thatboth directions in which the wire is moving may be utilized for drawingand therefore the steps of the single reel in the old system can bedistributed over two reels, 1a, lb as shown. Besides it is possible herewithout any difficulty to proceed in downward direction, that is, toarrange the smallest step of each reel at the top. As compared with theopposite arrangement of the old system, this involves the a vantage thatthe tangential velocity of the parts near the level of the liquid iscomparatively small and splashing is eliminated.

The reels 141,112 are sup orted at one end only, as in the old machine,at as the steps of the process are distributed over twov reels, or ma'be distributed over any greater number o reels, as will be describedfurther below, the load on the several shafts 6a, 67) is reduced toone-half or a still smaller fraction of'load on a single shaft. Besidesthe sleeve on the shaft is dispensed'with, eliminating the necessity ofproviding a clearance and of making the smallest step of the reel largerthan required. Therefore with an arrangement as illustrated in .Figs.1,. 2.

and 3 it is possible to greatly reduce the diameter of the reel ascompared with that of the old system.

The threading of the wire is facilitated by removing the immersed-partsof the mechanism from the cooling liquid. This may be effected bydisplacing the mechanism with respect to the tank or by displacing thetank with respect to the mechanism. In the examples to be describedhereinafter the mechanism is movable and the tank is stationary, but theconverse arrangement will readily be apparent to any person skilled inthe art.

As illustrated in Figs. 1, 2 and 3, the'casing 8 is equipped. with a.handle 14 and a balance weight 15 by means of which its reels may beplaced in any desired position from the vertical to the horizontal asshown in Fig. 3. It is obvious that any convenient position may beselected in which the parts are held for threading and it will beunderstood that threading is performed as readily as in a machinewithout a cooling tank.

The driving shaft 9 is arranged co-axially with respect to the hollowtrunnions of the casing 8. Preferably the casing 8 constitutes aself-contained unit which protects the parts housed therein againstaccess of impurities and quite particularly against splashes from thecooling liquid in the tank 5. The casing 8 may be provided with anoil-tight cover (not shown) and may be filled with oil, grease or otherlubricant for the parts which are operating therein.

The balance weight 15 not only facilitates the manipulation of thecasing 8, but also holds it in the position which has been imparted toit by the handle 14 so that it will not swing back with a jerk when thehandle 14 is released by carelessness. lVhere a motor is provided on thecasing, aswill be described, such motor may be so arranged as to serveas a balance weight.

- 16 is a casing which is integral with one f the trunnion bearings, 19is a vertical shaft in the casing, 17 18 are bevel gears on the drivingshaft 9 and the shaft 19, respectively, and 4 is a winding drum securedon the projecting end of the shaft 19. The casing 16 might also beconnected with the casing 8 so as to partake in its rocking movement.

As mentioned above, any number of reels exceeding two may be arranged ona. common support or casing. For instance a set of reels may bedistributed in a circle and the drawplates may be arranged in one ormore rows in parallel to the axes of the reels. The wire after movingonce round the circular set of reels is separated and threaded throughthe following die of the next row of draw-plates.

Such an arrangement is illustrated in Figs. 4 and 5. 20 and 21 are twoof the reels which project downwardly from the casing 8, the casingbeing trunnioned on the tank 5 as described. The other reels in frontand to the rear of the reels shown are arranged with their shafts on acircle, the centre of which coincides with the axis of the drivin shaft22. 23 isa pinion on the shaft 22, and 24 are spur gears on the shaftsof the several reels which are meshing with the pinion 23. R0- tationimparted to the shaft 22 by a motor 26 which also serves as balanceweight for the parts supported by the casing 8. Obviously a drivingshaft in co-axial arrangement with respect to the trunnions of thecasing might also be provided. as described with re terence to Figs. 1to 3, but it is preferable to combine the balance weight with the motor.3 are the draw-plates which are arranged A particularly simple andconvenient solu tion of the problem in which a casing is arranged torock about a pivot arranged independently of the tank. is illustrated inFigs. 6 and 7. Here the casing 8 with the reels 1a, 1b is secured to theend of a rocking frame 28 which is pivoted about a shaft 29 in uprights30. With the pivot of therocking frame arranged independently of thetank 5 it is possible to move the reels 1a and 16 from their verticalposition into an inclined position, While still within the coolingliquid or the-tank 5. and also to lift the reels altogether from thetank. This involves several advantages, one of which is that anyprojections on the tank or at least on three of its sides, for holdingthe reels above the tank and for lifting and lowering the reels areeliminated so that any manipulations in connection with the cooling tankand the reels are not interfered with by such projections. This is veryimportant as the operator is able to get access to the reels fromoutside. without any obstruction. i

- With this convenient arrangement it is not necessary to sacrifice anyof the favorable features described with reference toa-ny of theprevious figures. For instance a motor 26 may be arranged on the frame28, preferably in such manner as to act as a balance weight.

a pulley 27 being provided on the driving shaft 9 for the reels.

The angle through which the axes of the reels 1a. 1b are displaced fromthe vertical is equal to the angle about which the frame 28 is rocked.Therefore'if it were desired to move the reels into horizontal position.it

' would be necessary to move the frame 28 into vertical position whichwould be inconvenient for considerations of space. Apart from this theinvariable. relation of the inclination of the reels and the frame isundesirable for another reason, to wit, each inclination of the reelscorresponds to a given elevation above the tank 5 and this may beinconvenient as stated. since considerable space must be available abovethe bencl overcome by providing means for rocking the casing 8 withrespect to the frame 28. for which purpose it may be trunnioned in theframe 28 similarly as it is trunnioned on the tank 5 in Figs. 1 to 3. Anarrangement of this type is not illustrated but will readily beunderstood by anybody skilled in the art. The

. These drawbacks are drive from the motor 26 is not interfered with bythe pivotal arrangement of the casing 8 as the pulley 27 and the drivingshaft .9 are co-axial with the trunnions about which the casing rocks.

- A lever-like handle 14 (Figs. 2 and may be provided for rocking thecasing 8 about its trunnions, but it is also possible to provideautomatic means for rocking the casing 8 in conformity with the rockingmovement of the frame 28, for instance by pivoting a system of links andleversto one of the uprights 30 at one end and to the casing 8 at theother end. In this manner, by suitably selecting the leverage of thesystem, any suitable angular position of the reels may be combined withany inclination of the frame 28, for instance so as to invariably holdthe reels in horizontal position for any inclination of the frame 28. Inthis manner it is alsopdssible to obtain, with inclinations of the frame'28 which do not extend beyond and need not even attain, the verticalposition of the frame 28, positions of the reels 1a. 1?) above theirhorizontal position. A mechanism of the kind described has not beenillustrated but will be readily understood by any person skilled in theart.

It may also be desirable to thread the wire at a station remote from thetank and to this end it is necessary that the frame should be displacedlaterally. For instance the uprights 30 may be combined into a singlecentral pillar in which a' bracket 31 (Fig. 6) may be pivoted about avertical axis.

I wish it to be understood that I do not desire to be limited to theexact details of construction shown and described for obviousmodifications willoccur to a person skilled in the art.

1.. A Wire-drawing machine comprising a lubricant-containing tank, a.frame mounted to rock with respect to said tank, a main 'shaftjournalled in said frame, means for rotating said main shaft, dies onsaid frame, a winding shaft operatively connected to said main shaft andjournalled in said frame, means on said winding shaft for moving wirethrough said dies, said winding means being so positioned as to entersaid tank in certain positions of said frame with respect to said tank,and means for rocking said frame so as to alternately dip 'said windingmeans into the lubricant in said tank, and to-extract it therefrom.

2. A wire-drawing machine comprising a 1lubricant-containing tank, aframe mounted -to rock with respect to said tank. a mam.

shaftjournalled in said frame, means for rotating said main shaft whichare so arranged as to balance the weight of the other members mounted onsaid frame. dies on said frame. a winding shaft operatively connected tosaidmain shaft and journalled in said fing wire through said dies, saidwinding means being so positioned. as to enter said tank in certainposltions of said frame with respectto said tank, and means for rockingsaid frame so as to alternately dip said winding means into thelubricant in said tank, and to extract it therefrom.

3. A wire-drawing machine comprising a lubricant-containing tank, aframe mounted to rock with respectto said tank, a main shaft journalledin said frame, driving means on said main shaft which are so arranged asto balance the weight of the other members mounted on said frame, dieson said fran1e,'a winding shaft operatively connected to said main shaftand journalled in said frame, means on said winding shaft for movingwire through said dies, said winding means being so positioned as toenter said tank in certain positions of said fran'ie with respect tosaid tank, and means for rocking said frame so as to alternately dipsaid winding means into the lubricant in said tank. and to extract ittherefrom.

4. A wire-drawing machine comprising a lubricant-containing tank, aframe mounted to rock with respect to said tank, a main shaftjournalledin said frame in co-axial relation to "the axis said frame ismounted to rock about, means for rotating said main shaft, dies on saidframe, a winding shaft operatively connected to saidunain shaft andjournalled in said frame, means on said winding shaft for moving wirethrough said dies, said winding means being so positioned as to entersaid tank in certain positions of said frame with respect to. said tank,and means for rocking said frame so as to alternately dip said windingmeans into the lubricant in said tank, and to extract it there from.

5. A wire-drawing machine comprising a lubricant-containing tank, aframe mounted to rock with respect to said tank, a main shaft journalledin said frame, means (for rotating said main shaft, dies on said frame,a. winding shaft operatively connected to said main shaft and journalledin said frame transversely to said main shaft, means on said windinshaft for moving Wire through said dies, said winding means. being sopositioned as to enter said tank in certain positions of said frame withrespect to said tank, and means for rocking said frame so as toalternately dip said winding means into the lubricant in said tank, andto extract it therefrom.

6. A wire-drawing machine comprising a lubricant-containing tank, aframe mounted to rock with respect to said tank, a main shaft journalledin said frame, means for rotating said main shaft, dies on said frame, awinding shaft operatively connected to said main shaft and journalled insaid frame at right an les to said main shaft, means on said win ingshaft for moving wire through said dies, said winding means being sopositioned as to enter said tank in certain positions of said frame withrespect to said tank, and means for rocking said frame so as toalternately dip said winding means into the lubricant in said tank, andto extract it therefrom.

7. A wire drawing machine comprising a lubricant-containing tank, apivot fixed outside said tank, a frame mounted to rock about said pivotwith respect to said tank, a main shaft journalled at one end of saidframe, means for rotating said main shaft arranged at the other end ofsaid frame, dies on said frame, a winding shaft operatively connected tosaid main shaft and journalled in said frame at the end where saidmainshaft is positioned, means on said winding shaft for moving Wirethrough said dies, said winding means being so positioned as to entersaid tank in certain positions of said frame with respect to said tank,and means for rocking said frame so as to alternately dip said windingmeans into the lubricant in said tank, and to extract it therefrom.

8. A wire-drawing machine comprising a lubricant-containing tank, aframe mounted to rock with respect to said tank, a main shaft journalledin said frame, driving means on said main shaft which are so arranged asto balance the weight of the other members mounted on said frame, dieson said frame, a winding shaft operatively connected and extending inparallel to, said main shaft and journalled in said frame, means on saidwinding shaft for moving wire through said dies, said winding meansbeing so positioned as to enter said tank in certain positions of saidframe. with respect to said tank, and means for rocking said frame so asto alternately dip said winding means into the lubricant in said tank,and to extract it therefrom.

9. A wire-drawing machine comprising a lubricant-containing tank, acasing mounted to rock with respect to said tank, a main shaftjournalled in said casing, means for rotating said main shaft, dies onsaid casing, a winding shaft operatively connected to said main shaftand journalled in said cas- J OHANNES FRIEDR. .DIEHL.

